<span>As the human population grows, our natural resource requirements
increases. The answer is letter A. One, the source of food is important for survival.
More humans needed the right nutrition to improve bodily functions. And therefore,
more lands are to be cultivated for agricultural production to suffice the needs
of the society.  Two, humans need extra habitable
area to live.  It does not go in cycles because
the ecosystem is not balanced. Population explosion is the main cause why these
natural resources slowly decreases and at the same time increases their demand.</span>
        
                    
             
        
        
        
Answer:
C. Charged, polar, or non-polar
Explanation:
Amino side chains, also called R groups, are classified into the categories of charged, polar, and non polar.
These classifications can be determined by the structure and elements within the R group/functional group.
 
        
             
        
        
        
The female sex cells are called the egg and Male sex cells are called the sperm. Hop this helped.